Question

HELP ME AND GET 100 POINTS

suppose the time is denoted as t. between which value of t is the speed of the truck increasing?

A. between t=6 and t=8 and between=16 and t=20
B between t=0 and t=6 and between t=10 and t=12
C. between t=8 and t=10 and between t=14 and t=16
D. none of the above

Answer 1

D. none of the above

Explanation:

On a speed-time graph, we can determine whether the object is accelerating, decelerating, or maintaining a constant speed by observing the shape of the graph.

• If the graph has a positive slope, it indicates that the object is accelerating, i.e. the speed is increasing. The steeper the slope, the greater the acceleration.
• If the graph has a negative slope, it indicates that the object is decelerating, i.e. the speed is decreasing. The steeper the negative slope, the greater the deceleration.
• If the slope of the graph is zero (a horizontal line), it indicates that the object maintaining a constant speed.

Therefore, to find the times when the speed of the truck is increasing, find the values of t where the slope of the line is positive.

Therefore, the speed of the truck is increasing:

• between t = 0 and t = 6, and between t = 10 and t = 14.